package com.wonders.bigdata.dubborpc.netty;

import com.wonders.bigdata.dubborpc.provider.HelloServiceImpl;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

/**
 * Description: 服务器端handler相对简单<br>
 *
 * @author: XB
 * @date: 2022/2/8 15:32
 */
public class NettyServerHandler extends ChannelInboundHandlerAdapter {
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        // 获取客户端发送的消息，并调用服务
        System.out.println("msg = " + msg);
        // 客户端在调用服务器的api时，我们需要定义一个协议
        // 比如我们每次发消息时， 都必须以某个字符串开头"HelloService#hello#"
        if (msg.toString().startsWith("HelloService#hello#")) {
            String result = new HelloServiceImpl().hello(msg.toString().substring(msg.toString()
                    .lastIndexOf("#") + 1));
            ctx.writeAndFlush(result);
        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        ctx.close();
    }
}
